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10:00 a.m.
1202 Martin Hall
For More Information:
Amanda McCrum
301 405 9378
amccrum@umd.edu
http://energy.umd.edu/transforming-energy-lectures
Dr. Yuki Katoh
Senior Manager and Scientist, Toyota
"Sulfate-based Solid-State Batteries"
Abstract:
Large-scale batteries are in high demand for applications such as plug-in electric hybrid or electric vehicles, and smart electric power grids. The all-solid-state battery is the most promising candidate for future battery systems, due to the high energy density obtaining by direct-series-stacking of the battery cells. However, the poor electrochemical characteristics of the all-solid-state battery, due to higher cell-resistivity than conventional liquid electrolyte batteries, still remain as an unsolved issue. We will demonstrate an all-solid-state battery with extremely high power performance that employs the superionic conductors having the Li10GeP2S12-type crystal structure. The battery can operate over a wide temperature range with extremely high current drains of 3 mAcm-2 (−30 ºC), 100 mAcm-2 (25 ºC), and 1000 mAcm-2 (100 ºC). Careful electrochemical examination of the all-solid-state battery with the same battery configuration as a liquid electrolyte system revealed that the rate characteristics are simply dependent on the difference in state of electrolyte. The vert high power characteristics of solid state battery comes from intrinsic ion transportation mechanism of solid electrolyte.
Speaker Biography:
Dr. Katoh has been serving as a senior manager at Toyota Motor Europe NV/SA in Belgium since 2015. His department deals with researches on innovative batteries for sustainable mobility, including all-solid-state batteries, metal-air batteries, and sodium-ion batteries. Dr. Katoh received his Ph.D in Engineering in 2014 from Tokyo institute of technology in Japan. Dr. Katoh started his industrial carrier in 2008 when he was employed at Toyota Motor Corporation in Japan, where he dedicated the development of All-solid-state battery.
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